Environmentally Friendly Techniques for the Recovery of Polyphenols from Food By-Products and Their Impact on Polyphenol Oxidase: A Critical Review

Even though food by-products have many negative financial and environmental impacts, they contain a considerable quantity of precious bioactive compounds such as polyphenols. The recovery these from wastes could diminish their adverse effects in different aspects. For doing this, various nonthermal conventional methods are used. Since extraction may cause plenty problems, due to heat production extreme need for energy solvent, novel technologies microwave, ultrasound, cold plasma, pulsed electric field, pressurized liquid, ohmic heating technology been regarded alternatives assisting the process. This paper highlights competence mild polyphenols by-products, effect on polyphenol oxidase, application recovered industry.